2311019987 has 2 divisors, whose sum is σ = 2311019988. Its totient is φ = 2311019986.

The previous prime is 2311019969. The next prime is 2311020011. The reversal of 2311019987 is 7899101132.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2311019987 - 2²⁴ = 2294242771 is a prime.

It is not a weakly prime, because it can be changed into another prime (2311019917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1155509993 + 1155509994.

It is an arithmetic number, because the mean of its divisors is an integer number (1155509994).

Almost surely, 2^2311019987 is an apocalyptic number.

2311019987 is a deficient number, since it is larger than the sum of its proper divisors (1).

2311019987 is an equidigital number, since it uses as much as digits as its factorization.

2311019987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 41.

The square root of 2311019987 is about 48073.0692488008. The cubic root of 2311019987 is about 1322.1109449576.

The spelling of 2311019987 in words is "two billion, three hundred eleven million, nineteen thousand, nine hundred eighty-seven".